Benito Amilcare Andrea Mussolini (29 July 1883 – 28 April 1945) was an Italian politician and journalist who was the dictator of Italy during the Fascist period, which lasted from the March on Rome in 1922 until his overthrow in 1943. He founded the National Fascist Party (PNF) and served as Prime Minister of Italy from 1922, later adopting the title Duce ("leader") of Italian fascism. Mussolini first organized the Fasci Italiani di Combattimento (lit. 'Italian Fasces of Combat') in 1919, which evolved into the PNF that established a totalitarian regime. As the founder of fascism, Mussolini was a key inspiration and contributor to the rise of similar movements across Europe during the interwar period.
Mussolini was originally a socialist journalist at the Avanti! newspaper. In 1912, he became a member of the National Directorate of the Italian Socialist Party (PSI), but was expelled for advocating military intervention in the First World War. In 1914, Mussolini founded a newspaper, Il Popolo d'Italia, and served in the Royal Italian Army until he was wounded and discharged in 1917. He eventually denounced the PSI, his views pivoting to focus on Italian nationalism, and founded the fascist movement which opposed egalitarianism and class conflict, instead advocating "revolutionary nationalism" transcending class lines. In October 1922, following the March on Rome, he was appointed prime minister by King Victor Emmanuel III. After removing opposition through his secret police and outlawing labour strikes, Mussolini and his followers consolidated power through laws that transformed the nation into a one-party dictatorship. Within five years, he established dictatorial authority by legal and illegal means and aspired to create a totalitarian state. In 1929, he signed the Lateran Treaty to establish Vatican City.